package com.mmall.concurrency;


import com.mmall.concurrency.annotions.NotThreadSafes;
import lombok.extern.slf4j.Slf4j;

import java.util.concurrent.CountDownLatch;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Semaphore;

import static java.util.concurrent.Executors.*;

/**
 * <p>Descriptions...
 *
 * @author Diamon.Cheng
 * @date 2019/12/2.
 */

@Slf4j
@NotThreadSafes
public class ConcurrencyTests {
    
    
    //请求总数
    public static  int  clientTotal = 5000;
    
    //同时并发执行的线程数
    public  static  int  threadTotal=100;
    
    
    public static int count = 0;
    
    public static void add(){
        count++;
    }
    
    public static void main(String[] args)  throws  Exception{
    
        ExecutorService  executorService =newCachedThreadPool();
        final Semaphore  semaphore= new Semaphore(threadTotal);
        final CountDownLatch countDownLatch = new CountDownLatch(clientTotal);
    
        for (int i = 0; i< clientTotal; i++){
        executorService.execute(()->{
        try {
            semaphore.acquire();
            add();
            semaphore.release();
            
        }catch (Exception e){
            log.error("Exception",e);
        }
        countDownLatch.countDown();
        });
        }
        
        countDownLatch.await();
        executorService.shutdown();
        log.info("count: {}",count);
    
    }
}
